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m in (-oo:+oo)
3*(2-(5*m)) = -114 // + 114
3*(2-(5*m))+114 = 0
3*(2-5*m)+114 = 0
3*(2-5*m)+114 = 0
120-15*m = 0
120-15*m = 0
120-15*m = 0 // - 120
-15*m = -120 // : -15
m = -120/(-15)
m = 8
m = 8
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